Is it possible?

Is it possible to create game like this BLOCKADE 3D on Steam in Unreal engine 4?

There are thousands destructeble blocks.

If you know what you are doing. yes.

Of course, although if you want a generated world, your going to have to write quite a few algorithms, and do lots of math ( I mean a lot when I say a lot). You will also get a horrible FPS if you don’t know how to properly optimize the game, but anything is possible.